two experts to study water issues recently issued a document that China needs a multi-level water pollution solutions, approaches to solve the drinking water problem primarily through infrastructure development and undesirable.
The two experts are Professor Tao Tao and letter Kunlun associate professor of Tongji University College of Environmental Science and Engineering, they issued a "public health in" Nature "magazine, published July 31: Chinas sustainable drinking water development plan "(hereinafter referred to as public ). Tongji University is also a member of two scholars, "the Ministry of Education Key Laboratory of Yangtze River Water Environment".
"public" Wen cited a number of studies published over the data, pointing out that China water pollution and water shortage has very serious: there are 190 million Chinese people due to pathogenic pollution, water pollution caused by 6 million people each year diseases (such as liver and gastrointestinal cancer) death, there are about 300 million people face drinking water shortages. In the 2009 national assessment in 4000 waterworks 1/4 do not strictly enforce quality control. 2011 to 800 wells were analyzed nine provinces found that 76.8% of which do not meet the standards of groundwater.
The Chinese government has taken some measures, such as the 2015 invested 410 billion yuan to improve the safety of drinking water for 54 percent of urban residents. Its core is the transformation of 92,300 km main pipeline and thousands of water treatment plants in accordance with international standards.
but "public" Wen believes that this kind of infrastructure improvements focused approach is not suitable for China. Expected by 2050, China is still a developing country, urban sprawl speed will exceed the public water supply system improved speed, which has been treating contaminated water will bring huge investment.
article suggested that the government should pay attention to most is the protection of water sources and recycling of water. It must first clear the industrial and agricultural pollution of rivers and lakes, and prevent these contaminants into groundwater.
Allegedly, China each year 40 billion tons of water scarcity, 655 cities in 2011 consumed 44 billion tons of water, with an average consumption of 66 million tons each city. In 2020, when Chinas urban population reached 60% of the total population, the city will need 58 billion tons of water. However, about 2/3 of the water for industry, agriculture and construction, residential water does not exceed 1/3, and the proportion of domestic water for drinking and cooking is very small, only 2%more. In other words, most of the domestic water need not meet drinking water standards.
The experts believe that China should use a water purifier such as cheaper technology - Chinese water industry is growing at about 40 percent a year, and buy bottled drinking water, people increasingly the fewer, but water purification equipment is not yet standardized. Perfect after-sales service will lead to improper maintenance and timely replacement of the filter will not breed microbes, and the filter made from non-food-grade plastic is not up to the purifying effect. They suggested that the next step to promote the use of cheap, low-carbon water purifiers in all the family, and noted that this approach has achieved success in some developing countries in Africa.
In the two experts, local and central government water supply and management of water pollution should be merged to create an agency to manage - at present these are the building housing the Ministry of Water Resources, Environmental Management section loose. In addition, the government should standardize water purifier and supervision, and support and guide the development of the industry.
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